I had a problem with the serial monitor. It would only provide information if I set the baud rate to 4800 baud, but in my code I set the serial to 9600 baud. Software serial was also not working properly. The board was a Pro Mini 8 Mhz which was set properly in the ide. Also the board worked properly previously. The problem happened after I installed some additional boards for ESP 32 and Seed. Reloading and upgrading the AVR board manager fixed the problem.
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